Perhaps do something similar to an advent calendar....where each day present a small trinket or candy or maybe small pics of various spots in WDW (you could easily print that off from the internet).
Or designate one night a week (or more if you're up to it) for a Disney movie night.
With their meals, maybe incorporate the number of how many days you have left into their food. I.e. Make pancakes in the shape of a mickey head...and with food coloring while the pancake is cooking, "write" the # of days left onto the pancake.
Anyway, those are just a few ideas.